Co2+-substitution effect in Ce-TZP/La M-type hexaferrite composites

Authors
Kojima, T Sakamoto, W Yogo, T Fujii, T Hirano, S
Citation
T. Kojima et al., Co2+-substitution effect in Ce-TZP/La M-type hexaferrite composites, J AM CERAM, 83(2), 2000, pp. 281-286
Citations number
29
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
ISSN journal
00027820 → ACNP
Volume
83
Issue
2
Year of publication
2000
Pages
281 - 286
Database
ISI
SICI code
0002-7820(200002)83:2<281:CEICMH>2.0.ZU;2-1
Abstract
A Ce-TZP/platelike La(Co(Fe0.9Al0.1)(11))O-19 composite was synthesized in situ while sintering from a mixture of Ce-TZP, La(Fe0.9Al0.1)O-3, Fe2O3, Al 2O3, and CoO powders. Platelike La(Co(Fe0.9Al0.1)(11))O-19 crystals were gr own in a dense CeTZP matrix after sintering at temperatures of 1200 degrees -1350 degrees C. The temperature range for sintering Ce-TZP/La(Fe,Al)(12)O- 19 composites was expanded widely by substituting Co2+ ions for Fe2+ ions i n its structure. The highest value of the bending strength of the Ce-TZP/La (Co(Fe0.9Al0.1)(11))O-19 composites was 880 MPa, which was higher than that of the Ce-TZP/ La(Fe,Al)(12)O-19 composite (780 MPa) and Ce-TZP (513 MPa). The saturation magnetization of the Ce-TZP/ La(Co(Fe0.9Al0.1)(11))O-19 com posite was a constant value of 7.7 emu/g after the composite was sintered a t 1200 degrees-1350 degrees C.